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Canary upgrade breaks local disk source on Windows VM

After upgrading to a canary release, a Windows Server VM's local disk source can no longer be added or backed up.

Tier II · Emerging Problems that are still building up.

3 public reports · first reported 14 August 2026 · last reported 15 August 2026

Idea report · $9 · No contacts · All sales final

See a sample idea report

What's going wrong

After moving a Windows Server virtual machine to a newer canary release of a backup tool, a job that backed up the system drive stopped working.

AI-assisted: written with the help of AI from the reports. The idea report has the full summary.

In the idea report

  • The full summary.
  • The products the 3 reports are about, and how many came each month.
  • Related problems.

No business has been found with this problem yet, so the report has no contacts. All sales are final — no refunds. Pricing.